2007 Pontiac Grand Prix About 2 Years Ago Car Blowing Out Cold Air Ran Heater

2007 PONTIAC GRAND PRIX
140,000 MILES
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TEDAVI01
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  • 1 POST
About 2 years ago my car was blowing out cold air when I ran the heater I got the heater core replaced then it worked great.. Last year I had the same problem I took it in they replaced the water pump and flushed it out .. Iut worked great again .. Now this year I have the same thing again.. We changed the thermostat and flushed it again it worked great for a week and now its back to cold air... Is it the switch??
Nov 7, 2012 at 3:18 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
when engien is warm see if heater hoses are both hot, if they are check the actuators in heater box. check the actuator that i have pointed to in the pic
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Nov 7, 2012 at 3:42 PM
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